/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package be.free.ts.support;

import com.google.common.base.Objects;
import org.springframework.data.domain.Persistable;

import javax.persistence.*;

/**
 * @author Christophe De Blende
 * @since 09/12/12
 */
@MappedSuperclass
public abstract class AbstractPersistable implements Persistable<Long> {

	protected AbstractPersistable() {
	}

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@Version
	private Long version;

	@Override
	public Long getId() {
		return id;
	}

	public Long getVersion() {
		return version;
	}

	@Override
	public boolean isNew() {
		return id == null;
	}

	@Override
	public int hashCode() {
		return Objects.hashCode(id, version);
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == null) {
			return false;
		}
		if (this == obj) {
			return true;
		}
		if (!getClass().equals(obj.getClass())) {
			return false;
		}
		AbstractPersistable other = (AbstractPersistable) obj;
		return Objects.equal(id, other.id)
				&& Objects.equal(version, other.version);
	}

}
